Umbrella



FIG. 1 is a front perspective view of an umbrella showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a front view thereof when collapsed;

FIG. 9 is a top view thereof when collapsed; and,

FIG. 10 is a bottom view thereof when collapsed. 

The ornamental design for an umbrella, as shown. 